*{
	margin: 0px;
	padding: 0px;
}
.head{
	width: 100%;
	height: 50px;
	background-image: linear-gradient(rgb(0,0,0,0.5),rgb(0,0,0,0.1) );
}
.content{
	width: 1200px;
	height: 50px;
	margin: auto;
	background-image: linear-gradient(rgb(0,0,0,0.5),rgb(0,0,0,0.1) );
}
